comphead opened a new issue, #3817:
URL: https://github.com/apache/datafusion-comet/issues/3817

   ### What is the problem the feature request solves?
   
   Observed the issue when Comet is not fully utilizing Spark cluster 
parallelism.
   Input: 1200 HDFS files, number of Spark planned tasks: 1800. Every file is 
splittable, so Spark utilizes all 1800 scanning and writing the shuffle whereas 
Comet utilizing only 1200 tasks having 600 idle.
   
   I was not able to reproduce the same locally, will try on local HDFS later
   
   ### Describe the potential solution
   
   _No response_
   
   ### Additional context
   
   _No response_


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